JP6924585B2 - Built-in fan device - Google Patents

Description

The present invention relates to a fan built-in device having a fan built in a case, such as a heat source device such as a water heater.

For example, as shown in FIG. 5, a heat source device such as a water heater 20 is provided with a combustion chamber 22 provided with a combustion device such as a burner 21 in a box-shaped case 1 to burn the burner 21. A fan 8 for sending air for the purpose, a heat exchanger 23 heated by the burner 21, and the like are also housed in the case 1. The burner 21 burns the burner with the air introduced into the case 1 by the drive of the fan 8 and the fuel gas supplied from the gas pipe 24, and the heat heats the water passing through the heat exchanger 23 to generate heat. The combustion gas generated by the burner combustion is discharged to the outside from the exhaust stack 25.

FIG. 6A shows a schematic view of an example of a cross-sectional view of the case 1 of the water heater 20. In this figure, the left side of the figure is shown in front of the water heater 20. As shown in the figure, the front plate 2 of the case 1 is formed with an air supply port 3 at a lower portion thereof, and the air supply port 3 is the fan 8 (not shown in the figure). Plays a role of introducing air into the case 1 from the outside of the case 1 at the time of driving. Inside the front plate 2, a rainproof plate 4 for preventing rainwater (for example, fine raindrops such as a mist) introduced together with the air introduced from the air supply port 3 of the front plate 2 from entering is in front. It is arranged so as to face the plate 2 with a gap between them, and a gap 16 through which air passes is formed between the upper end portion of the rainproof plate 4 and the ceiling side of the case 1.

Further, it has been proposed that the rainproof plate 4 is formed with a vent 5 as shown by the broken line in the figure, and the vent 5 is formed in the plate as shown in FIG. 6B, for example. It is formed by a through hole formed in the rainproof plate 4 by forming a character-shaped notch and forming a raised portion 15. A plurality of vents 5 are formed, for example, on either the left or right end side of the rainproof plate 4 (for example, the region B when the front plate 2 is viewed through in FIG. 7A) with a gap between them. There is.

In the case 1 provided with the rainproof plate 4 having the vent 5, as shown in FIG. 6A, the air introduced from the air supply port 3 of the front plate 2 is shown by the arrow A. It flows upward toward the gap 16 side between the upper end of the rainproof plate 4 and the ceiling side of the case 1, and a part of the flow flows toward the vent 5 side as shown by arrow A'. Then, the air flows inside the case 1 from the rainproof plate 4 through the gap 16 and the vent 5.

As shown in FIG. 7A, for example, a plurality of air supply ports 3 are arranged in an array on the front surface of the front plate 2 so as to be vertically and horizontally spaced from each other. Further, in the case 1 of the water heater 20, as shown in FIG. 7B, a plurality of air supply ports 13 are arranged in an array on the side plate 11 and the bottom plate 12 communicating with the front plate 2. Air is also introduced into the case 1 from the air supply port 13 (in FIG. 7B, the illustration of the air supply port 3 is omitted for the sake of simplification of the figure).

Instead of the front plate 2, one of the side surfaces of the case 1 can be formed in the same manner as the front plate 2, and in that case, the surface of the side plate (the surface on the outside of the case 1). It is also possible to form the air supply port 3 on the surface). In the present specification and the like, a plate such as a front plate 2 in which the air supply port 3 is formed and vertically formed is referred to as an air introduction port forming plate.

Japanese Unexamined Patent Publication No. 10-185328 Utility Model No. 2506731

However, in a conventional heat source device such as a water heater 20, there is a gap 16 or a vent 5 on the upper side of the rainproof plate 4 from the air supply port 3 of the front plate 2, the side plate 11, and the air supply port 13 of the bottom plate 12. There is a bias in the flow of air flowing toward the side, for example, some air flows to the gap 16 side at a very slow speed, while some air flows to the gap 16 side at a very fast speed of, for example, about 10 m / sec. rice field. In particular, the speed of the air introduced from the air supply port 3 of the front plate 2 and flowing to the gap 16 and the vent 5 side is high, and the rainwater contained in the air together with the air having a high flow velocity passes through the gap 16 and the vent 5. , There is a problem that it is easy to invade the inside of the case inside the rainproof plate 4.

Further, the rainproof plate 4 also functions as a sound insulation plate for the fan 8 and the motor built in the case 1, but in the conventional case 1, the air flow is biased as described above. Therefore, the air pressure loss is also large, and therefore, the rotation speed of the fan 8 must be increased in order to obtain the amount of air required for burning the burner in the water heater 20, which causes a problem that the noise level becomes high. there were.

The present invention has been made to solve the above problems, and an object of the present invention is to prevent rainwater contained in the air introduced from the air supply port from entering the inside of the case, and when the fan is driven. It is an object of the present invention to provide a device with a built-in fan such as a heat source device such as a water heater, which can reduce noise.

In order to achieve the above object, the present invention is a means for solving a problem with the following configuration. That is, the first invention includes a case in which a fan is housed, the case has an air inlet forming plate formed upright, and the air inlet forming plate has the case when the fan is driven. An air supply port for introducing air into the case is formed from the outside of the case, and rainwater introduced together with air introduced from the air supply port of the air introduction port forming plate is formed inside the air introduction port forming plate. A rainproof plate for preventing intrusion is arranged so as to face the surface of the air inlet forming plate with a gap, and a first vent for air to pass through is provided on the upper end side of the rainproof plate. is formed, the second vent at a position lower than the air introduction port forming plate the air supply port formed in the proof rain plate is formed, the air supply of the air introduction port forming plate is diverted into a downwardly airflow flowing downward toward the upward air flow the air to be introduced from the mouth to flow upward toward the first vent side to said second vent side, the speed of the upward air flow The fall speed of rainwater should be less than the falling speed, and the distance from the air supply port to the first vent is upward while the upward airflow flows from the air supply port to the first vent. The air is transferred to the first vent and the second vent in a state where the rainwater contained in the upward airflow has fallen while reaching the first vent , which is the distance at which the rainwater contained in the airflow finishes falling. Means for solving the problem with a configuration in which the infiltration of rainwater introduced together with the air introduced from the air supply port into the inside of the rainproof plate is suppressed by flowing to the inside of the case through the vent. It is supposed to be.

The second invention is, in addition to the configuration of the first invention, the height of the air supply port of the air introduction port forming plate height of the height of the first vent and the second vent The intermediate height of the air is characterized by being an intermediate height between the height of the first vent and the height of the second vent .

Furthermore, the third invention, the first or in addition to the second aspect of the invention, folded toward the anti-rain plate notch is formed from a-proof rain plate opposite the air inlet forming plate A blade plate formed so as to project diagonally upward is provided, and a gap between the blade plate and the notch forming portion of the rainproof plate is formed as a second vent.

Further, in the fourth invention, in addition to the configuration of the third invention, the root side of the folded back of the blade plate is formed into a curved surface shape with a bulge on the side opposite to the air introduction port forming plate side, and the blade is formed. The tip side of the plate is characterized in that it is vertically formed upright.

Further, the fifth invention, the third or in addition to the configuration of the fourth aspect of the invention, the vane plate and the second ventilation port of the anti-rain plate, the casing along the plate surface of the Boameban central is arranged diagonally formed in a manner to fall toward the case end portion side than the side, rainwater end of the casing end portion side of said slats it hits the blades provided on the casing end of the Is characterized in that it flows down along the wall surface of the case.

Further, in the sixth invention, in addition to the configuration of the third, fourth or fifth invention, a plurality of the second vents of the rainproof plate are formed in the vertical direction with a space between them. It is characterized in that the blade plates formed corresponding to the vents are arranged so as to have a shutter shape.

Further, in the seventh invention, in addition to the configuration of any one of the first to sixth inventions, a combustion device that burns in the case by utilizing the air introduced into the case by a fan drive. Is provided, and the heat source device is capable of supplying the heat generated by the combustion of the combustion device.

According to the present invention, the case in which the fan is housed has an air inlet forming plate that is vertically formed and a rainproof plate that is arranged inside the air inlet forming plate so as to face each other with an interval. Air is introduced from the outside of the case through the air supply port formed in the air inlet forming plate at the time of driving, and this air is directed toward the first vent side formed at the upper end of the rainproof plate. It is divided into an upward airflow that flows upward and a downward airflow that flows downward toward the second vent side formed at a position below the air supply port in the rainproof plate.

Then, the speed of the upward airflow is set to be less than the falling speed of the rainwater (the speed at which the upward airflow flows can be made less than the falling speed of the rainwater) , and from the air supply port to the first vent. Is the distance at which the rainwater contained in the upward airflow finishes falling while the upward airflow flows from the air supply port to the first vent, and is therefore introduced from the air supply port. Even if the air contains rainwater, the air is transferred to the first vent and the first vent in a state where the rainwater contained in the upward airflow separated from the air has fallen to the first vent. By flowing to the inside of the case through the second vent, the infiltration of rainwater introduced together with the air introduced from the air supply port into the inside of the rainproof plate is suppressed, and the rainproof plate It is possible to accurately prevent rainwater from entering the inside of the case.

Therefore, according to the present invention, the air flowing inside the rainproof plate can be smoothly sent to the fan side through the first vent when the rainwater has fallen, and the air containing the rainwater is sent to the fan. It is possible to obtain the required amount of air even at a smaller fan speed than in the case, and it is possible to reduce the noise when the fan is driven. Since the air flowing to the second vent side flows downward, rainwater easily falls to the lower side in front of the second vent, and when the air flows to the inside of the rainproof plate through the second vent. However, it is difficult for rainwater to enter the inside of the rainproof plate together with the air.

Further, by the intermediate of the height of the height of the air supply port of the air introduction port forming plate and the height of the first vent and the second vent, good diversion balance of air Therefore, the speed at which the upward airflow flows can be made even more reliably below the falling speed of rainwater. Therefore, it is possible to more accurately perform the operation of dropping the rainwater contained in the upward airflow to the first vent and letting the rainwater flow through the first vent to the inside of the rainproof plate in the dropped state. , The above effect can be exhibited more accurately.

Furthermore, the rain-proof plate notch is formed a vane which is protruded obliquely upward is provided by folding back from-proof rain plate toward the opposite side of the air inlet forming plate, the the the vane plate rainproof By forming a gap between the plate notch forming portion and the second vent, rainwater contained in the air flowing to the second vent side can be easily dropped by hitting the blade plate. That is, the air flows through the second vent to the inside of the case rather than the rainproof plate, but the rainwater contained in the air easily falls in front of the second vent as described above, and further, it does not fall. Even if you try to go to the second vent side, it will hit the blade plate and flow down between the rainproof plate and the air inlet forming plate in an attempt to go straight according to the law of inertia, so it is inside the case than the rainwater rainproof plate. It is possible to efficiently prevent invasion into.

In particular, the root side of the folded blade plate is formed into a curved surface shape with a bulge on the side opposite to the air inlet forming plate side, and the tip side of the blade plate is vertically formed to stand upright. Since rainwater can easily hit the formed portion very accurately, the effect of efficiently preventing rainwater from entering the inside of the case can be exhibited more reliably than the rainproof plate.

Additionally, the vane plate and the second ventilation port of the Boameban is disposed diagonally formed in a manner to fall toward the center side casing end portion side than the case along the plate surface of the Boameban and, the ends of the casing end portion side of the vane is provided in the casing end portion, by a structure in which rainwater hits the said vane flows down along the wall surface of the case, adverse effects of rain water Can be prevented even more reliably. That is, as described above, the rainwater hits the blade plate when the air passes through the second vent and flows down between the rainproof plate and the air inlet forming plate, but by any chance, a part of the rainwater is rainproof. Even if it flows inside the board, the main built-in parts such as the fan of the case built-in device are not provided on the wall side of the case, so it is possible to prevent rainwater from adhering to the built-in parts. , The adverse effect of rainwater can be prevented even more reliably.

Further, when formed in this way, the gap between the diagonally upper end side of the blade plate and the plate surface of the rainproof plate can be formed small or without a gap, and rainwater can be more reliably prevented from entering the inside of the rainproof plate. be able to.

Further, a plurality of second vents of the rainproof plate are formed in the vertical direction with a gap between them so that the blade plates formed corresponding to the respective vents have a shutter shape. By arranging the arrangement, the air diversion balance can be further improved, and the total opening area of the second vent can be easily expanded, so that the above effect can be exhibited even better. Can be done.

Further, the case is provided with a combustion device that burns by using the air introduced into the case by driving a fan, and is formed as a heat source device capable of supplying heat generated by combustion of the combustion device. It is possible to realize an excellent heat source device that can exert each of these effects.

It is a schematic diagram which shows the cross-sectional structure of the case front side for demonstrating one Example of the fan built-in apparatus which concerns on this invention. It is a schematic explanatory view which shows the structure of the case front plate and the rainproof plate of the fan built-in apparatus of an Example, (a) and (c) are views which were seen from the side surface side, (b) is the front surface (front) side. It is a figure seen from. It is a schematic cross-sectional view (a) and the schematic perspective view (b) of the vane plate formed on the rainproof plate of the fan built-in device of an Example. It is a schematic explanatory drawing which shows the rainproof plate of the fan built-in device of an Example by the figure seen from the side opposite to the front plate side. It is a schematic diagram which shows the structure of the water heater which is an example of a device with a built-in fan, omitting the plate surface of a case. It is a schematic cross-sectional view (a) which shows the case structure of the water heater of a proposed example, and the schematic front view (b) which shows the structure of the vent formed in the rainproof plate provided in the case. .. It is a front view (a) and a perspective view (b) which show typically the front plate of the conventional water heater.

Hereinafter, embodiments of the present invention will be described with reference to the drawings. In the description of this embodiment, the same reference numerals will be given to the parts having the same names as those described above, and the duplicated description will be omitted or simplified.

FIG. 1 shows a case configuration of an embodiment of the fan built-in device according to the present invention by a schematic cross-sectional view, and FIG. 2 shows the configurations of the front plate 2 and the rainproof plate 4 of the case 1. Has been done. The device with a built-in fan of this embodiment is a water heater 20, and similarly to the conventional example, for example, a component as shown in FIG. 5 is provided in the case 1 and formed. As shown in 2, the front plate 2 and the rainproof plate 4 are arranged to face each other with a gap between them. However, in this embodiment, the formation mode of the air supply port 3 of the front plate 2 and the rainproof plate 4 are arranged. The configuration of is the characteristic configuration described below.

That is, in this embodiment, the first vent 6 through which air passes is formed on the upper end side of the rainproof plate 4, and is formed on the right end side of the rainproof plate 4 when viewed from the front plate 2 side. The vent 5 forms a second vent (see FIG. 2B), and the second vent 5 is formed at a position below the air supply 3 formed on the front plate 2. The distance from the air supply port 3 to the first ventilation port 6 and the distance from the air supply port 3 to the second ventilation port 5 are formed to be substantially equal. In this embodiment, a plurality of second vents 5 are formed in the vertical direction with a gap from each other, and the distance from the central portion in the vertical direction to the air supply port 3 is the distance from the air supply port 3 to the first. (The height of the air supply port 3 is an intermediate height between the height of the first vent 6 and the height of the second vent 5) .

In this embodiment, the arrangement of the air supply port 3 and the first and second ventilation ports 5 and 6 is such an arrangement, so that the air introduced from the air supply port 3 is first ventilated. It is configured to be divided into an upward airflow that flows upward toward the port 6 side and a downward airflow that flows downward toward the second vent 5 side, and the air supply port 3 and the first and second air supply ports 3 and the first and second airflow ports. The air resistance when air passes through based on the opening areas of the vents 6 and 5 of the above is appropriately balanced, and is formed so that the balance between the upward airflow and the downward airflow is good. Then, the upward airflow is weakened by the diversion, and the air is dropped into the first vent 6 and the second vent 5 in a state where the rainwater contained in the upward airflow falls to the first vent 6. By flowing to the inside of the case 1 through the above, the infiltration of rainwater introduced together with the air introduced from the air supply port 3 into the inside of the rainproof plate 4 is suppressed.

In other words, the falling speed of rainwater is 7 m / sec for a normal raindrop with a diameter of 2 mm, and 4 to 6 m / sec for a light rain with a diameter of 1 mm to 2 mm (General Meteorology (Yoshimitsu Ogura, University of Tokyo). Press, 1984) p.86) On the other hand, in this embodiment, the upward airflow from the air supply port 3 to the first vent 6 side is weakened by the diversion, so that the air flow is upward. Since the speed at which the air flow flows is formed to be less than 4 m / sec and can be made less than the falling speed of rainwater, even if the air introduced from the air supply port 3 contains rainwater, it can be removed from the air. Air flows inside the case 1 through the first vent 6 and the second vent 5 in a state where the rainwater contained in the divided upward airflow has fallen to the first vent 6. As a result, the infiltration of rainwater introduced together with the air introduced from the air supply port 3 into the inside of the rainproof plate 4 is suppressed.

Of the rainwater, smaller particles of mist or mist, for example, mist or mist that is occasionally seen in highlands and is sucked in from the air supply port 3 and appears to be almost floating (for example, with a diameter of less than 1 mm). Those with a diameter of 0.5 mm and a falling speed of 2 m / sec) occur very infrequently, so it is not necessary to consider such infiltration of rainwater.

Further, since the air flowing to the second vent 5 side flows downward, rainwater easily falls to the lower side in front of the second vent 5, and the air passes through the second vent 5 to the rainproof plate 4. Even if it flows inward, it is difficult for rainwater to enter the inside of the rainproof plate 4 together with air.

Further, in this embodiment, the formation mode of the second vent 5 has the following characteristic configuration. That is, a notch is formed in the rainproof plate 4, and as shown in FIGS. 2 to 4, the rainproof plate 4 is folded back from the rainproof plate 4 toward the opposite side of the front plate 2 (the side opposite to the front plate 2 side). A blade plate 7 is provided so as to project diagonally upward, and a gap between the blade plate 7 and the notch forming portion of the rainproof plate 4 forms a second vent 5. As shown in FIG. 3A, the root side of the folded back of the blade plate 7 is formed in a curved shape with a bulge on the side opposite to the front plate 2 side, and the tip side of the blade plate 7 is vertical. It is formed upright in. In FIG. 1, the blade plate 7 is omitted.

Further, the vent 5 and the blade plate 7 of the rainproof plate 4 are arranged and formed obliquely along the plate surface of the rainproof plate 4 so as to be lowered from the center side of the case 1 toward the end side of the case 1. The end of the blade plate 7 on the end side of the case 1 is provided at the end of the case 1, and the rainwater that hits the blade plate 7 flows along the blade plate 7 to the end side of the case 1. It is configured to flow down along the wall surface of the case 1. Further, as shown in FIGS. 2, 3 (b) and 4, a plurality of second vents 5 are formed at intervals in the vertical direction (arranged at equal intervals as shown in FIG. 4). The blade plates 7 formed corresponding to the second vents 5 are arranged so as to have a shutter shape. In addition, in FIG. 1, for the sake of simplification of the figure, the number of arrangements of the second vent 5 is shown to be small.

Further, as shown in FIGS. 2A and 2C, the air supply port 13 is formed on the side plate 11 and the air supply port 13 (not shown) is also formed on the bottom plate 12 in this embodiment as well. Has been done. In this embodiment, the total opening area of these air supply ports 13 is formed wider than that of the conventional example, the air flow is made smoother, the pressure loss is reduced, and the noise during fan driving is reduced. In the present invention, these forming modes are not particularly limited, and are appropriately set.

Further, in the present embodiment, the rain return plate 8 is formed on the upper end side of the rainproof plate 4, and when the air flowing toward the first vent 6 hits the rain return plate 8, it is included in the air. The rainwater that had been drained is now falling. Like the second vent 5, the rain return plate 8 is also formed so as to be slanted so as to be lowered toward the end side of the case 1 from the center side of the case 1 (see FIG. 2 (b)). ), The rainwater that hits the rain return plate 8 flows along the rain return plate 8 to the end side of the case 1 and flows down along the wall surface of the case 1.

The present invention is not limited to the above-described embodiment, and various aspects can be adopted as long as the technical scope of the present invention is not deviated. For example, in the above embodiment, the distance from the air supply port 3 to the first vent 6 and the distance from the air supply port 3 to the second vent 5 are formed to be substantially equal, but the air supply port 3 is formed. The air introduced from the air is divided into an upward airflow that flows upward toward the first vent 6 side and a downward airflow that flows downward toward the second vent 5 side, and the upward airflow is weakened. If the configuration is such that the intrusion of rainwater introduced from the air supply port 3 together with the air introduced into the inside of the rainproof plate 4 is suppressed, the air supply ports 3 to the first and second ventilation ports 6 and 5 are used. The distances do not necessarily have to be formed approximately equal.

Further, in the present embodiment, the formation mode of the second vent 5 is as shown in FIGS. 2 to 4, but for example, the root side of the folded back of the blade plate 7 is different from the front plate 2 side. It does not have to be formed in a curved shape with a bulge on the opposite side, and the vent 5 and the blade plate 7 are located along the plate surface of the rainproof plate 4 at the end of the case 1 rather than the center side of the case 1. It does not have to be arranged and formed diagonally so as to be lowered toward the side. Further, the number of the blade plates 7 and the second vents 5 to be arranged is also appropriately set, and the blade plates 7 are preferably formed, but the blade plates 7 do not necessarily have to be formed, for example, cutting. It may be a raised shape.

Further, in the above embodiment, the form of the rain return plate 8 on the upper end side of the rainproof plate 4 is formed so as to be inclined obliquely so as to be lowered toward the end side of the case 1 from the center side of the case 1. However, the form of the rain return plate 8 is not particularly limited and is appropriately set. Further, the formation mode of the air supply port 13 formed on the side surface of the front plate 2 is also appropriately set.

Further, in the above embodiment, the first and second vents 6 and 5 are formed in the rainproof plate 4, but the first vent 6 is not formed in the rainproof plate 4 and the upper end of the rainproof plate 4 is formed. A gap may be formed between the portion and the ceiling side of the case 1, and the gap may be used as the first vent.

Further, although the water heater 20 is used in the above embodiment, the device with a built-in fan of the present invention may be a heat source device other than the water heater, or a device with a built-in fan other than the heat source device.

The heat source device of the above embodiment is called a slim type water heater, and the width of a normal water heater is halved, for example, on a normal pipe shaft (width of one normal water heater) 2 It is a type of water heater that can be installed on a stand. It is mainly used to replace slim water heaters used in places with high land prices in the Tokyo metropolitan area. When newly installed, for example, in a small house in the metropolitan area, the exhaust direction of the appliance is not directed to the neighboring house side, but the exhaust direction of the appliance is directed to the direction along the own house. It is a water heater used to change the installation direction itself.

INDUSTRIAL APPLICABILITY The present invention can prevent rainwater contained in air from entering the inside of a case and can reduce noise when driving a fan, and thus can be applied to a household heat source device such as a water heater.

1 Case 2 Front plate 3 Air supply port 4 Rainproof plate 5 Second vent (vent)
6 First vent 7 Blade plate 8 Rain return plate 20 Water heater

Claims (7)

A case is provided in which a fan is housed, and the case has an air inlet forming plate formed upright, and the air inlet forming plate is provided with air from the outside of the case to the inside of the case when the fan is driven. An air supply port is formed to prevent rainwater introduced together with the air introduced from the air supply port of the air introduction port forming plate from entering inside the air introduction port forming plate. The rain plate is arranged so as to face the surface of the air introduction port forming plate with a gap between them, and a first vent through which air passes is formed on the upper end side of the rainproof plate, and the rain plate is provided with a first vent. A second vent is formed at a position below the air supply port formed on the air introduction port forming plate, and the air introduced from the air supply port of the air introduction port forming plate is the first. It is divided into an upward airflow that flows upward toward the vent side of 1 and a downward airflow that flows downward toward the second vent side so that the speed of the upward airflow is less than the falling speed of rainwater. Moreover, the distance from the air supply port to the first vent is such that the rainwater contained in the upward airflow finishes falling while the upward airflow flows from the air supply port to the first vent. In a state where rainwater contained in the upward airflow falls to the first vent as a distance, the air passes through the first vent and the second vent to the inside of the case. A device with a built-in fan, characterized in that by flowing, intrusion of rainwater introduced together with air introduced from the air supply port into the inside of the rainproof plate is suppressed. The first aspect of the present invention, wherein the height of the air supply port of the air inlet forming plate is an intermediate height between the height of the first vent and the height of the second vent. Built-in fan device. A notch is formed in the rainproof plate, and a blade plate formed by folding back from the rainproof plate toward the opposite side of the air inlet forming plate and projecting diagonally upward is provided, and the blade plate and the rainproof plate are provided. The fan built-in device according to claim 1 or 2, wherein a gap with the notch forming portion of the above is formed as a second vent. It is characterized in that the root side of the folded back of the blade plate is formed in a curved shape with a bulge on the side opposite to the side of the air introduction port forming plate, and the tip end side of the blade plate is vertically formed upright. The device with a built-in fan according to claim 3. The second vent of the rainproof plate and the blade plate are diagonally arranged and formed so as to be lowered from the center side of the case toward the end side of the case along the plate surface of the rainproof plate. The end of the blade plate on the case end side is provided at the end of the case so that rainwater that hits the blade plate flows down along the wall surface of the case. The device with a built-in fan according to claim 3 or 4. A plurality of the second vents of the rainproof plate are formed with a gap in the vertical direction from each other, and the blade plates formed corresponding to the respective vents are arranged in a shutter shape. The fan built-in device according to claim 3 or 4, or 5. The case is provided with a combustion device that burns using the air introduced into the case by driving a fan, and is a heat source device capable of supplying heat generated by combustion of the combustion device. The device with a built-in fan according to any one of claims 1 to 6, wherein the device has a built-in fan.

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